The purpose of this chapter is to expose and explain some problems on conceptual modelling in multimedia databases. By way of introduction after a short orientation of the problem a description is made of the idea of conceptual modelling starting from the ISO report of van Griethuysen (1987) where some fundamental concepts and definitions is considered. A discussion is carried out considering the modelling techniques and their capability and/or limitations concerning modelling environments in order to create multimedia databases. The discussion indicates that the general concepts and definitions in conceptual modelling suggested in the ISO report comprises the foundation to analyse more complex information such as multimedia contexts. The paper also proposes that the interactivity, communication (especially the pragmatic and semantic layers of communication) and information of information are all key factors in the process of understanding how conceptual modelling can support multimedia databases